Carbon-holder for arc-lamps.



M. C. WARREN. CARBON HOLDER FOR ARC LAMPS.

APPLICATION FILED AUG. 10, 1911.

Patented Feb. 25, 1913.

Jvwemto'n M 5 242171 77;

I and it is the primary aim MYCAG-AH C. WARREN, OE- COFFEYVILLE; KANSAS.

CARBON-HOLDER FOR ARC-LAMPS.

Specification of Letters Patent.

' Patented Feb. 25, 1913.

' Application flledAuzust 10,1911. Serial K0. (43,310.

To all whom it may concern:

Be it knownithat I, MYCAGAH' C. a citizen: of the- United States, residing at Cofi'eyville, in the county of Montgomery and State of Kansas, have invented certain new and useful Improvements. in Carbon- Holders for Arc-Lamps, of which the following: is a specification.

This invention relates to carbon holders for are lamps and more particularly to a holder for the lower carbons of such a lamp, of the invention to provide a holder so constructed that the said lower carbons may be readily clamped in place and readily removed.

The invention further aims to so construct the holder that the carbons will be firmly clamped in place in proper alinement WARREN,

with the upper carbons regardless of any slight irregularities in dimensions or irregularities in contour.

For a full understanding of the invention reference is to be had to the following description and accompanying d 'awing, in which:

Figure l is a perspective view of the carbon holder embodying the present invention, a pair of carbons being illustrated in connection therewith. Fig. 2 is a vertical transverse sectional view through the holder. Fig. 3 is a horizontal sectional view through the holder.

Corresponding and like parts are referred to in the following description and indicated in all the views of the accompanying drawing by the same reference characters.

The holder embodying the present invention comprises a body which is indicated by the numeral 1 and is formed with arecess opening at its upper side. The body 1 is oblong and the recess extends lengthwise thereof and has parallel side walls and endwalls 3 which extend in a semi-circle and are arranged to receive and embrace substantially one-half of the ends of the carbon supported by the holder. Blocks 4 are disposed Within the recess and are provided each with a beyond the 6 formed walls of the recess. These slots extend lengthwise of the said walls of the recess and the blocks at may be slid toward or from the respective end-walls of the recess. That face of each block which opposes the adjacent end-walls of the recess is concaved as sides of the block and into slots pin 5 which projects at its ends at opposite points in the side indicated by the numeral 3 so as to partly embrace the end of the carbon inserted be- In order to force the blocks 4 toward the respective ends of the recess and against the carbons which they are to clutch, there.

is provided a wedge-block 9 which is fitted between the inclined sides 8 of the two blocks 4 and has threaded into it the upper portion of a clamping screw 10. This screw is fitted through an opening 11 in the bottom wall of the recess and the shank of this screw is provided with a head to bear against the under side of the body 1 when the screw is tightened, and with a flattened finger-piece 13 by means of which the screw may be turned. Under ordinary conditions the screw may be properly tightened by turning it through the medium of the finger-piece 13, but if desired, a wrench may be engaged with the head 12 to more firmly draw the wedge-block v9 into 'wedging engagement, between the blocks 4. From the foregoing it will be readily understood that the projected ends of the pins 5 serve not only to limit the movement of the blocks 4 toward each other so that the wedge-portion 9 may be readily inserted into place should the clamp screw 10 be entirely disengaged therefrom, but serve also to prevent these blocks from being withdrawn from the recess when the carbons are removed.

The carbons are indicated in the drawings by the reference character 0 and are inserted at their lower ends between the endwalls of the recess and the concaved sides of the blocks 4 and rest at their lower extremities upon the bottom wall of the recess. From inspection of Figs. 2 and 3 it will be understood that the carbons may be firmly clamped in proper position Whether or not they are of uniform size and contour.

Having thus described the invention what is claimed as new is I 1. A carbon holder for a multiple arc lamp comprising a body having a recess, and having the side walls of its recess formed with pairs of slots oppositely located, the end-walls of the recess being formed to partly embrace the ends of the carbons, blocks arranged in the recess one 12 adapted adjacent each end thereof 'and formed also to partly embrace the said ends of the carbons, the blocks being slidable longitudinally of the recess and having pins projecting into the slots to limit the slidin movement of the blocks and prevent then withdrawal from the recess, and wedge-means positioned between the blocks for holding the same against the said ends of the carbons.

2. A carbon holder for a multiple arc lamp comprising a body having a recess, blocks arranged within the recess one arranged adjacent each end thereof and formed also to partly embrace the said ends positioned between the blocks for holding the same against the said ends of the carbons. In testimony whereof, I aflix my signature in presence of two witnesses.

M'YCAGAH C. WARREN. [1 s.] Witnesses:

ISADOR Lr'rMAN, J. S. BROWNE. 

